The Complete Blueprint to LinkedIn Ad Sizes and Specs

Running high-performing campaigns on LinkedIn requires more than just a sharp message and precise targeting—it demands flawless technical execution. If your image dimensions are off by just a few pixels, or your video file size crosses the hard limit, your ads can look pixelated, get awkwardly cropped, or fail to upload entirely.

To help you get the most out of your budget, this comprehensive guide breaks down the essential ad sizes, aspect ratios, and file requirements for LinkedIn’s top ad formats.

1. Single Image Ads (Sponsored Content)

Single image ads are the most common and versatile format on LinkedIn, appearing directly in the user’s feed. Because professionals browse LinkedIn on both desktop and mobile devices, supporting multiple aspect ratios is key.

| Treatment | Recommended Size | Aspect Ratio | Maximum File Size | File Formats |
| :— | :— | :— | :— | :— |
| Landscape | 1200 x 628 px | 1.91:1 | 5 MB | JPG, PNG, GIF |
| Square | 1200 x 1200 px | 1:1 | 5 MB | JPG, PNG, GIF |
| Vertical (Mobile Only) | 720 x 900 px | 4:5 | 5 MB | JPG, PNG, GIF |

• Pro Tip: Vertical (4:5) and square (1:1) formats occupy more screen space on mobile phones, typically driving higher thumb-stop and click-through rates (CTR) than traditional landscape layouts.

2. Video Ads

Video content is a powerful way to demonstrate product value, showcase customer testimonials, or share thought leadership. LinkedIn supports a wide range of video dimensions to match your creative style.

• Aspect Ratios Supported: 16:9 (Landscape), 1:1 (Square), 4:5 (Vertical), and 9:16 (Vertical)
• Recommended Production Sizes:
  • Landscape (16:9): 1920 x 1080 px
  • Square (1:1): Up to 1920 x 1920 px
  • Vertical (4:5): 720 x 900 px (Recommended)
  • Vertical (9:16): 720 x 1280 px up to 1080 x 1920 px
• File Type: MP4
• File Size: 75 KB to 500 MB
• Duration: 3 seconds to 30 minutes (though 15 to 30 seconds is the sweet spot for maximum engagement)
• Frame Rate: 30 FPS or lower

3. Carousel Ads

Carousel ads let you showcase multiple swipeable cards in a single ad unit—ideal for step-by-step guides, product features, or distinct case studies.

• Card Count: 2 to 10 cards per ad
• Recommended Image Size: 1080 x 1080 pixels (1:1 square)
• Maximum File Size: 10 MB per card
• File Formats: JPG, PNG, or non-animated GIF

4. Text & Dynamic Ads (Right-Rail Placements)

Text and dynamic ads are desktop-focused placements that sit neatly on the right rail of the LinkedIn interface, making them cost-effective choices for lead generation and brand awareness.

• Text Ads:
  • Logo Size: 100 x 100 px (JPG or PNG, max 2 MB)
  • Headline: Up to 25 characters
  • Description: Up to 75 characters
• Spotlight & Follower Ads:
  • Company Logo: 100 x 100 px (JPG or PNG, max 2 MB)
  • Optional Background Image (Spotlight Ads): 300 x 250 px

5. Message & Conversation Ads

Delivered straight to a user’s LinkedIn Messaging (InMail) inbox, message-based ads are great for personalized outreach, event invites, or whitepaper downloads.

• Optional Desktop Banner: 300 x 250 px (JPG, PNG, or non-animated GIF, max 2 MB)
• Note: The banner only appears when targets view their inbox on a desktop device, so ensure your core text copy stands strong on mobile devices where banners won’t render.

Quick Checklist Before You Launch

1. Double-check text overlays: Keep text away from the extreme edges of your images and videos so it never gets blocked by native elements like timestamps, profile icons, or CTA buttons.
2. Export with precision: Stick closely to LinkedIn’s recommended aspect ratios to prevent the platform from automatically cropping your creative assets.
3. Verify file weights: Large video or image files will trigger upload errors; compress your assets beforehand without sacrificing visual clarity.

By designing your creatives to match these exact dimensions from the start, you will save time, protect your visual quality, and ensure your brand looks professional across every device.